Machine for testing incandescent lamps.



T w FRBGH, J1 MACHINE FOR TESTING- INOANDEBGENT LAMPS. APPLIOATIOH FILED D30. 86, 1905. 7

922,123, Patented May18,1909. I SHEETS-SHEET 1.

lsrxnlps adapted to a diileront voltage UNITED STATES I PNlETN'T ()Fflil'CE.

THEODORE W. FBECH, JR", OF CLEVELAND; OHIO, ASBIGNOR TO NATIONAL ELECTRIC LAMP COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF NEW JERSEY.

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Specification of Letters Patent.

. Patented May 18, 1909.

' Application fllcdneoember 2Q, 1008. Burial No. 8118,89;

To all whom it may concern:

Be it known that I, Tnsononn W. FREOH, Jr., a. citizen of the United States, residing at Cleveland in the county of Ouyahoga and State of Ohio, have invented a certain new and useful 1m rovement in Machines for Testing Incan escont Lamps, of which the following is a full, clear and exact descriptron, reference being he to the accompanydrawings. he obgect of this invention is to provide a machine or testing tbs-{physical condition of incandescent lamps ter the bulbs have been secured in their bases.

Testin as conducted with this a. parotus is multifo d in its character but is anned to ascertain, among other thin ,.w other the filaments are perfect and roe from weak spots. This test has heretofore been made by screwing the lamp bases into testing sockets by hand, a. process which is exceedingly slow. An additional function-of this machine is to test the rigidity of the bases,a n

looseness being readily ascertained by fee ing the lamps into the ra idly rotating socket and maintaining a s ht ressure thereon with the hand. This machine further enables the operator to determine whether the bases have been properly applied to the bulb so that their axes are coincident with that of the bulbs,-any variation therefrom causing the lamp to wobble as the socket rotates. Finally the mechanism is so arranged that in a: dition to the above tests, the operator's attention will be directed to an variation in voltage from the standard of he lot under inspection i but it must be clearly borne in mind that the is not a photometric proceeding: and is moral intended to pick out stray lamps which ve accidentally become mixed with a lot of eferring to the mzcmnpanying rawings, 'guro 1 presents a vertical soot-ion of an operating rotatable testing spindle having a fixed ermanent socket at its u apor end. Fig. ZIsahorizontaltransvoi-se sec ion taken on the line 2-2 of Fig.1. Fig. 3 is a front elevation of tho maoluno showing duplicate spindles mounted so as to he operate: alternately. Fig. 4 is a side elevation portly broken away. 5 is a diagrammatic view showing the ectric connections.

From Fig. 1, it will be seen that the reswitch.

. the friction ceiving socket A is rigidly secured to a rotatable 8 indleA' and adopted to rotate therewith, 4 at separated therefrom by suitable insulation A". A strip .6. from thelowor end of the receiving socket extends into a mercury cup A carried by the spindle, and is al o insulated therefrom so that current connection may be m means of a, terminal D. dependinginto the mercury cup,see 5. The indie has splincd thereto a friction clutch adapted to be thrown into frictional engagement with either of two opiositel rotating pulley wheels A, A, win are 'ven by a rope or belt properly mounted on dgluicle ulleys A A. The mounting of the 'ving elt ls'not shown, as the manner and means of securing,

this opposite rotation is obvious and-may bcvarier m any desiredmanner. The friction clutch is thrown upwardl or downwardly to engage the pulley wheels y means of a yoke lever B em room the some and connected to foot tlendles B B.

From Fig. 3 it will be seen that I have provided du hcate spindles, oi the character described a ove, inwhich the respective Eric: tion clutches are connected by means of a walking beam B with the sheet of rotating the two spindles simultaneously ln opposite directions. This is for the urpose of increasing the speed of manipu ation since the ads with the socket by:

operator is thereby enabled to' utilize both' ho d hands-en's for ing a bulb to be screwed into its testin sooket,-the other for holding a second bul which-is being removed from the second socket.

Referring to Figs. a and 5, 1t will be seen that when the current is thrown on controlling switchC, there is a constant into each mercury cup from one side Dpf the The wire E' from the other side of the switch is led to spring metal contacts E E adapted to bear against the ends of the yoke levers B as they are'thrown upwardly. thus affording a lead for the current throu h 'c utch to thespindle stem. ll us last mentioned wire E is also connected through two load lamps E E to spring metal contacts adapted to engage the yoke levers when they are drawn downwardly, and while wed into, their sodketa. W ten the yo e lever is thrown down the socket is rotated in the direction todraw the lamp into the same and as soon as the by the lam E or E, and lead wire E.

lamp base reaches the limit of its movement a circuit is established through the wire I), the terminal D, the lamp under test, the spindle A, lever 13, contact E or E, load The voltage of ie current being that for which the lam is adapted and the current passing thro the load lam in addition to the lamp no or test, the resu t will be that the filament of the latter will, in the main, glow dully while any weak or rcsistantspot therein wi I show up with noticeable brightness, enabling the operator to eliminate such defective specimens with great ra idity. While the lam is being fed into t 0 testing socket a t presbetween the base andthe bulb may be instantly felt. Further, the-lamp bases being of necessit ada ted to be fed into the testing cident, it will follow that any inclination of the axis of the bulb to that of its base will cause the bulb to wobble drunkenlyduring the rotation of the spindle,-thus bringing to the notice of the operator those cases in which the base is "out of true on the bulb. When the yoke lever is thrown upward, it will be seen that the current thro the lamp under test will no longfir flow t its corresponding load lamp ut will pass ,rectly thro lead cl), terminal D, socket A, the amp itself, spindle A, the yoke lever B, contact iece E and the lead wire E is the switch. his will throw the run current through the lamp as it is about tobe removed from the testing socket. Should the particular lamp under test happen to be adapted to a tor or less voltage thanthe ral lot of am being tested, the operar will, through t e dill'crenco 1n the glow of thefilainent, immediately notice that fact and lay the lamp aside.

; It is to be noted that whole the above described o ration is being carried on with.

one ban a corres nding series of opew tions, half a base ehind, will be carried on with the 0 er hand in the other testing natc in my claims as ahead, intending 151118 generic expression to cover the structure roadly whether the se arable socket memher be employed or omi ted.

s sure is mauitained by hand and any foosoness socket so at t ieir respective axes are coinheads are simultaneo.

' means for automatically open 1 llaving thus described my invention, I claim:

1. An apparatus for testi incandescent lamps com v using a rotatable lead mounted on a spii d c and insulated therefrom, means for rotatmg the head in opposite directions, a permanent electric connection for the head and movable mcans for effecting the reversal of rotation of the spindle connected with the spindle and adapted to engage an electric contact at a given point in its path.

2 An apparatus for testing incandescent lamps comprising a spindle carrying a trick tion clutch, rotatable connections therefor arranfged in such manner that upon the shiftng o the clutch the spindle may berotated mp. reverse direction, a head carried by said a indie and rotatable therewith but insulated .t ierefrom, a mercury cup carried i ana spindle below the head, means for ti .t e clutch, and an electric contact positions to engage a. part of and shifting means.

' 3. An apparetl for testing incandescent lamps comprisingspel of receivi heads haying terminal connections forests. a circuit throulgh an incandescent lamp when the lamp sp there n, means whereb each-oi said heads play be rotated in both dorections, mehinmfor-controlhng the direction of rotdtion of head, and connections between said 'controllin 'means whcrebvthe rotated, each in a direction opposite to the of the other.-

4. apparatus 'f0I' 't68tlng incandescent lamps comprising a socket adapted to'reoeive incandescent lamps-fund provided with an interim] screw thread and mounted on s. rotatable spindle, rota connection between sai' .rotati f means and the spindle adapted to be shifts a'iid cause the spindle to rotatein either direction and snd'closing ensn ul clutch,

the circuit through the lamp with the shifting of the means.

A 5. An apparatus for testuf incandescent lamps comprising a head an 'a spindle, rotating means, connection between the rotating means and the fillldlfl, means for reversing the rotation of iespindle, electric connections adapted to pass different volt to said head and s jndle, and circuit closing contacts so locate as to send a current of a certain voltage throu h the socket and spindie and an lamp in t 0 head when the head is rotated 11 one direction, and to send a diflcrent volt therothro h when the head is rotated in he opposite rection. y

In testimony w meet, I hereunto ailix my signature in'the presence of two witnesses. 'rnno. w. FREOH, JR.

Witnesses:

B. L. Bnown, F. Bonus. 

